6mm Shank Ball End Grooving Router Bit Set with 4 Different Cutting Diameter: 6mm/ 8mm/ 20mm/ 22mm Made of carbide alloy, high hardness and durable for long time, meet the high demands of woodworking. Round nose head, sharp blade for cutting rounded grooves and decorative slots in woodworking projects. Used with an edge guide to cut coves, great for fluted moldings, decorative columns, finger pulls, sill drip nails. Ideal woodworking cutter for plywood, chipboard, laminated veneers, MDF, solid surface, softwood, and other wood composite materials. Specification: Bit Type: Round Nose Bit Material: Carbide alloy color: as the picture Shank Diameter: 6mm Sizes: (Head Diameter x Cutter Height ---- Overall Length) 6mm x 5.5mm ---- 57mm 8mm x 7.2mm ---- 58mm 20mm x 19mm ---- 63mm 22mm x 22mm ---- 65mm Package Included: 4 x 6mm Shank Round Nose Router Bits